. >> some of the eu executives say the member states say increase in carbon tax is an affordable in cash-strapped times. >> the members are open to come up with concrete cut to cut these gases up the conference. >> with so many lights glowing in the night at thousands of cars rolling through the city, it they do not seem too worried about global warming. qatar's initials are highest in the world. >> they are ambitious open for change on global level. they want to work to a new agreement that will take effect by 2020. >> this is a historic conference. it is a vital importance, considering the items on the agenda. it is a turning point in the negotiations on climate change. >> breyer's, experts have sounded urgent warnings about melting polar ice and extreme weather. they say that in order to limit global temperature rise to two degrees celsius, greenhouse gas emissions must be kept low, but total emissions are still rising every year. many experts believe may it already be too late. temperatures could surge by of to four degrees celsius this century. compared to pre-industrial levels. the conseque